uint64 timestamp						# time since system start (microseconds)

uint8 FUNCTION_THROTTLE=0
uint8 FUNCTION_ROLL=1
uint8 FUNCTION_PITCH=2
uint8 FUNCTION_YAW=3
uint8 FUNCTION_MODE=4
uint8 FUNCTION_RETURN=5
uint8 FUNCTION_POSCTL=6
uint8 FUNCTION_LOITER=7
uint8 FUNCTION_OFFBOARD=8
uint8 FUNCTION_ACRO=9
uint8 FUNCTION_FLAPS=10
uint8 FUNCTION_AUX_1=11
uint8 FUNCTION_AUX_2=12
uint8 FUNCTION_AUX_3=13
uint8 FUNCTION_AUX_4=14
uint8 FUNCTION_AUX_5=15
uint8 FUNCTION_PARAM_1=16
uint8 FUNCTION_PARAM_2=17
uint8 FUNCTION_PARAM_3_5=18
uint8 FUNCTION_RATTITUDE=19
uint8 FUNCTION_KILLSWITCH=20
uint8 FUNCTION_TRANSITION=21
uint8 FUNCTION_GEAR=22
uint8 FUNCTION_ARMSWITCH=23
uint8 FUNCTION_STAB=24
uint8 FUNCTION_AUX_6=25
uint8 FUNCTION_MAN=26

uint64 timestamp_last_valid					# Timestamp of last valid RC signal
float32[18] channels						# Scaled to -1..1 (throttle: 0..1)
uint8 channel_count						# Number of valid channels
int8[27] function						# Functions mapping
uint8 rssi							# Receive signal strength index
bool signal_lost						# Control signal lost, should be checked together with topic timeout
uint32 frame_drop_count						# Number of dropped frames
